... table. I’ll do a test case on this below. Check the sample: If the table exists, you get a message like a table already exists. And even not changing there old code or script. If you’re looking to bulk-load tables, also check out the COPY command, which can be used to insert rows from a text or CSV file. Would it be feasible, using your suggestion, to simply put in two SQL statements, in the same query - first UPDATE when EXISTS, then INSERT when NOT EXISTS, to accomplist this in one go ? After a long time of waiting, PostgreSQL 9.5 introduced INSERT ON CONFLICT [DO UPDATE] [DO NOTHING]. PostgreSQL also has INSERT… ON CONFLICT UPDATE grammar from 9.5. Code: DO $$ BEGIN IF EXISTS (SELECT FROM educational_platforms WHERE technology='psql') THEN Delete and Return Deleted Information You can use the RETURNING clause to return values from the rows that were deleted using a bulk-delete statement: > My problem: if the insert fails because the value already exists, then > this starts a rollback of my entire transaction. In this case, you can use a combination of bulk delete and bulk insert. Now, TABLE IF NOT EXISTS is available so not require to scan any catalog table for checking the table existence. Please Sign up or sign in to vote. In this article, we’ll take a closer look at the Postgres ADD COLUMN IF NOT EXISTS command and check out some examples of its use. Now, if an entry with psql technology exists then we have to update the client count of that entry to 100 else insert the record with psql technology. Because, before PostgreSQL 9.1 this was not there and still they perception is the same. If you know there won't be concurrent inserts or deletes affecting the row of interest there is a way to do this in the INSERT statement. I’ll use the same file to load the data as in the previous post. Hi, When I'm using the query This option instructs PostgreSQL to add the new column only if the column name does not exist in the table. The solution I'm. The fastest method to load or unload data in PostgreSQL is the copy command. My project is in C# and I'm using PostgreSQL 9.3 with npgsql.dll 2.0.14. If record exists then update, else insert new record I have a table that contains a large amount of data which gets updated daily with either new data, or data (rows) that already exist in … 0.00/5 (No votes) See more: SQL. Re: Conditional INSERT: if not exists at 2006-08-23 20:57:44 from Bruno Wolff III Re: Conditional INSERT: if not exists at 2006-10-05 07:07:05 from Stuart Bishop Browse pgsql-novice by date I'm trying to achieve database abstraction in my project, but now I got stuck with doing a bulk INSERT in PostgreSQL. Some notes about indexes and foreign keys: It is usually faster to create the indexes and foreign keys after the bulk load and to delete or disable them before the load. Here are the statements that will do so. I have also published an article on it. If the updated data already exists, it replaces the old version. If the updated data does not exist, it is inserted to the database. Regards Phil How will you which records were updated, thus able to know which need to be inserted? Re: Conditional INSERT: if not exists at 2006-08-23 18:57:55 from Franck Routier; Responses. This option basically helps to perform DML actions like, Insert IF not Exists, Update IF Exists. 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